Adapting a graphic novel is always a challenge. A graphic novel provides lots of visual cues, but everything doesn’t easily translate to the screen.

“There’s always a question as to how much we should take from the original source material versus how much liberty we should be taking,” said Kim. “Thankfully the writer and the comic book company were very collaborative. Steven Christy, the head of Boom, is one of our executive producers. We were in touch with them regularly about the development process and I really like the balance we were able to find between respect for the original and originality.”

A drama with espionage agents naturally requires a lot of action scenes and this one is no exception. David Jung is pursued by legions of agents, including a ruthless tatttooed killer, played by Kim Ji-hoon. Daniel Dae Kim continues to do as many of his own action scenes as he can because he enjoys them.

“The older I get, the harder they get, but they’re as much fun, if not more than before,” said Kim. “Not many people like to do action. I do. I find that it actually helps my scene work as an actor because it activates me, it grounds me into the work. So, I’ll keep doing action scenes as long as the insurance companies will let me.”

Filming in Seoul was a different experience, but a rewarding one.

“There is a slightly different philosophy toward when it comes to how the actors work behind the scenes, makeup and hair and trailers and all the mechanics of those kinds of things,” said Kim. “But one thing that we have in common is the desire to really delve into storytelling. I was not surprised, but encouraged to see that every one of our actors really cared about their characters. They weren’t just doing it for a paycheck. It led to some really in-depth discussions about relationships and beats and scenes, and it was really heartening to know that that artistry transcends national boundaries.”

Butterfly airs on Prime starting on August. 13.

The story was originally published in Forbes.com, This interview was edited for length and clarity.